Mounting Photo Prints on Glass
Photograph prints can be mounted on glass with an adhesive made by soaking 1 oz. of sheet gelatine in cold water to saturation, then dissolving in 3-1/2 oz. of boiling water. Let the solution cool to about 110 deg. F., then immerse the print in it and squeegee, face down, on a clear piece of glass. When dry, take a damp cloth or soft sponge and wipe off any surplus gelatine on the glass.